bonjour
f (x) = 2 x² - 5 x + 7
f ( - 1 ) = 2 ( - 1 )² - 5 * - 1 + 7 = 2 + 5 + 7 = 14
g ( x) = 7 x + 9
g ( 3 ) = 21 + 9 = 30
f ( 3) = 2 *9 - 15 + 7 = 18 - 15 + 7 = 10
g ( -3) = - 21 + 9 = - 12
h ( - 2 ) = - 3 c'est dans le tableau
f ( - 1 ) = 2
h ( - 4 ) = - 1
h ( 1 ) = - 2
